From 3bae027c5e97b438ba54c1fa87f9afda37b88362 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=90=B4=E6=96=87=E5=B3=B0?= <kevin@lmve.net>
Date: Mon, 30 Mar 2026 18:05:05 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20*=20=E9=94=AE=E5=9C=A8=E7=A9=BA=E6=96=87?=
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- 当 freetext 为空时，* 应该添加到文本中
- 只有 freetext 有内容时，* 才作为退格键
---
 .../src/modules/CannedMessageModule.cpp                       | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/code/firmware-2.7.15.567b8ea/src/modules/CannedMessageModule.cpp b/code/firmware-2.7.15.567b8ea/src/modules/CannedMessageModule.cpp
index c825d1b..ad79b97 100644
--- a/code/firmware-2.7.15.567b8ea/src/modules/CannedMessageModule.cpp
+++ b/code/firmware-2.7.15.567b8ea/src/modules/CannedMessageModule.cpp
@@ -926,8 +926,8 @@ bool CannedMessageModule::handleFreeTextInput(const InputEvent *event)
         return handleTabSwitch(event); // Reuse tab logic
     }
 
-    // '*' key from TCA9535 numpad acts as backspace
-    if (event->kbchar == '*') {
+    // '*' key from TCA9535 numpad acts as backspace (only if there's text)
+    if (event->kbchar == '*' && this->freetext.length() > 0) {
         payload = 0x08;
         lastTouchMillis = millis();
         runOnce();